Deck 19: Service Panel Trim-Out

Question 1

The NEC permits overcurrent protection devices to be located in bathrooms.

Answer 1

False

Question 2

Which of the following will not cause an overcurrent condition?

A) Open circuit
B) Ground fault
C) Overload
D) Short circuit

Answer 2

A

Question 3

A 12 AWG branch circuit can be protected by a 15-ampere fuse or circuit breaker.

Answer 3

True

Question 4

When installing an ungrounded conductor in a circuit breaker, approximately __________ of insulation is stripped from the end of the conductor.

A) 1/8"
B) 1/4"
C) 1/2"
D) 3/4"

Question 5

NEC Article __________ provides many installation requirements for overcurrent protection devices.

A) 210
B) 230
C) 250
D) None of the above

Question 6

A two-pole circuit breaker is used to protect a 120-volt branch circuit.

Question 7

A(n) __________ fuse uses different fuse bases for each size fuse and an adapter that matches each fuse size is required.

A) cartridge
B) Edison base
C) Type S
D) stab

Question 8

A device intended to provide protection from the effects of arc faults is called a(n) __________ circuit breaker.

A) ground fault circuit interrupter
B) arc fault circuit interrupter
C) special protection
D) fuse

Question 9

On a 240-volt residential branch circuit or feeder circuit with 10 AWG conductors, a maximum of a __________-ampere overcurrent protection device must be used.

A) 20
B) 25
C) 30
D) Any of the above

Question 10

A(n) __________ fuse is enclosed in an insulating tube that confines the arc when the fuse blows and is available in either a ferrule or blade style.

A) cartridge
B) Edison base
C) type S
D) stab

Question 11

In residential wiring, all 120 volt, 15- and 20- amp branch circuits supplying outlets or devices in kitchens, family rooms, dining rooms, living rooms, parlors, libraries, dens, bedrooms, sunrooms, recreation rooms, closets, hallways, laundry areas, or similar rooms must be AFCI protected.

Question 12

A circuit breaker used to switch fluorescent lighting must be listed and have __________ marked on it.

A) OK for fluorescent lighting
B) FL
C) SWD only
D) SWD or HID

Question 13

All plug fuses are limited to circuits where the voltage between conductors does not exceed __________ volts. (General Rule)

A) 240
B) 125
C) 277
D) 208

Question 14

A fuse type that uses the same standard screw base as an ordinary light bulb and where the different fuse sizes are interchangeable with each other is called a(n) __________ fuse.

A) cartridge
B) Edison base
C) Type S
D) stab

Question 15

Type S fuses are classified at __________ amperes.

A) 0 to 15
B) 16 to 20
C) 21 to 30
D) All of the above

Question 16

A GFCI or AFCI circuit breaker should be tested at least once a ___________.

A) day
B) week
C) month
D) year

Question 17

A single-pole circuit breaker has one stab contact and a two-pole circuit breaker has two stab contacts.

Question 18

NEC Table __________ lists the ampacity of conductors used in residential wiring.

A) 240.6
B) 220.12
C) 250.66
D) 310.15(B)(16)

Question 19

In residential wiring, a 12 AWG copper conductor is protected by a __________-ampere or lower OCPD.

A) 15
B) 20
C) 25
D) 30

Question 20

The interrupting rating of fuses can be as high as __________ amperes.

A) 5,000
B) 10,000
C) 20,000
D) 300,000

Question 21

The circuit breakers are attached to the bus bar by contacts in the breakers commonly called ____________________.

Question 22

A 120 volt branch circuit or feeder circuit supplying a dishwasher will require a __________ circuit breaker.

A) single-pole
B) double-pole
C) HACR
D) three-pole

Question 23

The highest current at rated voltage that a device is intended to interrupt under standard test conditions is called the ____________________ rating.

Question 24

When working on an energized main breaker electrical panel, turning the main breaker 'OFF' disconnects power from the ____________________ side of the panel.

Question 25

Type S adapters are designed so that once inserted in a fuseholder, they cannot be ____________________.

Question 26

Cartridge fuses are available in both a __________ type and a __________ type.

A) long; short
B) round; oblong
C) ferrule; blade
D) open; closed

Question 27

Fuseholders for current-limiting fuses can not permit the insertion of fuses that are not ______________________________.

Question 28

Circuit breakers are always interchangeable with different manufacturer's panelboards.

Question 29

For circuit breakers, if the interrupting rating is different than ____________________ amperes, it must be marked on the breaker.

Question 30

Explain how a 240-volt circuit is wired differently than a 120/240-volt circuit.

Question 31

Explain what a hexagonal configuration on a plug fuse indicates.

Question 32

The color coding for a 30 amp Type S plug fuse is __________.

A) blue
B) orange
C) green
D) any of the above

Question 33

Because all of the ampacities listed in Table 310.15(B)(16) do not correspond with a standard fuse or circuit breaker size, the NEC allows the next __________ standard overcurrent device to be used up to 800 amps.

Question 34

All circuit breakers must be designed so that any fault must be cleared before the circuit breaker can be ____________________.

Question 35

The color coding for a 15 amp Type S plug fuse adapter is __________.

A) blue
B) orange
C) green
D) any of the above

Question 36

Because electric motors draw more current to get started than they do when running, ____________________ fuses are used to protect motor circuits.

Question 37

Describe how you can tell the difference between a 'regular' circuit breaker and a GFCI or AFCI circuit breaker.

Question 38

If an electrician chooses to use plug fuses in a new electrical installation, they must be ____________________-plug fuses.

Question 39

A 240 volt electric water heater branch circuit or feeder circuit will require a __________ circuit breaker.

A) single-pole
B) double-pole
C) HACR
D) three-pole

Question 40

Overcurrent protection devices must be readily accessible.

Question 41

Name an advantage to installing a multiwire circuit in residential wiring.

Question 42

When installing a two-pole circuit breaker to protect a two-wire Type NM cable feeding a 240 volt electric water heater, describe what needs to be done with the white conductor in the cable that will be terminated at the breaker.